Miner&#39;s lamp.



R. L. GRAVES.

MINER/S LAM APPLICATION FILED APR. 26, 1909.

Patented Dec. '7, 1909.

Ill'llll lllllllllllllml //Vl/E/VTOR RALPH L. GRAVES ATTORNEYS RALPH L.GRAVES, OF SUMPTER, OREGON.

IVIINEBS LAMP.

Specification of Letters Patent.

Application filed April 26, 1909.

Patented Dec. 7, 1909.

Serial no. 492,217.

T 0 all whom it may concern:

Be it known that I, RALPH L. GRAVES, a citizen of the United States,residing at Sumpter, in the county of Baker, State of Oregon, haveinvented an Improvement in Miners Lamps, of which the following is aspecification.

My present invention is an improvement upon those for which I havereceived Letters-Patent No. 853,078, dated May 7, 1907, and No. 886,20dated April 28, 1908.

1.11 both the inventions covered by above patents, the lamp is providedwith means connected with the wick-tube, for heating and liquefyingparaffin or other solid hydrocarbon, whereby it may be taken up by thewick and burned for illumination. In both cases, heat-conducting wiresare employed in connection with the wick proper, the same being extendedalongside the wick and down into the body of the lamp. These wires beingheated by the flame, conduct suilicient heat into the body of solidparaffin or other fuel held in the lamp, to liquefy the same so that itis readily taken up by the wick and consumed in the usual way. Inpractice, it has been found necessary to employ more than one of suchheat-conductors, since it often happens that a breeze or draft drivesthe flame to one side of the wick, and, in such case, but one conductorwould be heated, which would be insufficient to liquefy the paraiiin tothe required degree. The conductors, however, often become overheated,or heated too highly, and my present invention relates to means foradjusting the projecting ends, or outer extensions, of the concuctors sothat they may be brought into close proximity with the wick and flame,or moved laterally therefrom, as conditions require.

The details of construction, arrangement, and combination of parts areas hereinafter described, and illustrated in the accompanying drawing inwhich Figure 1 is a longitudinal section of my improved lamp. Fig. 2 isan enlarged horizontal section on the line 2-2, Fig. 1. Fig. 3 is asimilar section, save that the heat conductors are shown adjustedfarther from the wick. Fig. 4- is a side view showing a modification;and Fig. 5 is a plan view of an adjustable disk forming a part of themodified invention.

The body of the lamp may have any ap proved construction, and it isprovided with a spout arranged in the usual way. A wicktube is connectedwith the cap of the spout and extends down to near the bottom of thebody of the lamp. Within this tube is ar ranged a wick container, orwick proper, which may be composed of conductive material, such ascopper wires.

It is to be understood that the wick-tube and wick proper may beconstructed in any approved manner so long as the wick shall be capableof taking up liquefied paraflin or other hydrocarbon. Heat-conductingwires 1 are arranged alongside the wick, or wicktube, and extend downinto the body of the lamp, as shown in Fig. 1, and also project from thespout-cap, or burner, as shown. preferably employ several of thesewires, which are arranged around the wick concentric therewith as willbe seen by reference to Figs. 2 and 3. The flame of the wick heats theextended or outer ends of these conductors, and thus sufficient heat isconducted to fuel in the body of the lamp to liquefy the same, so thatit may be taken up by the wick and burned in the usual way. It oftenhappens, however, that the projecting portions of the conductors 1become too highly heated, and I have, therefore, provided for adjustingthem laterally with reference to the wick in order to lessen the heat asmay be required.

In the preferred form of my invention illustrated in Figs. 1, 2, 3, adisk 2 having a series of arc-shape eccentric slots 3, is aplied to thecollar of the burner so as to be rotatable thereon. The conductors 1 proj ect through the said slots, and it will, therefore, be apparent that,by rotating the disk 2 more or less, the conductors may be moved outwardor inward as required to decrease or increase the degree of heatreceived from the flame of the burner. In Fig. 2, the disk 2 is shownadjusted in such manner that the conductors 1 are held close to thewick; but, in Fig. 3, the disk is shown adjusted so that the conductorsare at the outer ends of the slots and thus farthest from the wick. itis obviously practicable to adjust the disk 2 intermediately of theseextremes, so that the conductors 1 will occupy a position midway betweenthe two extremes indicated by Figs. 2 and 3. Since the disk 2 may becomeheated to such degree that the miner cannot rotate it by gripping itbetween a thumb and finger, the disk may be provided with a lateralprojection, and thus, with a piece of coal, or a knife, or othersuitable article, the miner may move the disk one way or the other asrequired.

In the modification shown by Figs. t and 5, the disk 2 is not rotatable,but adapted to slide vertically on the burner and the conductors l passthrough slightly enlarged openings in such disk. It will be seen that,by pushing the disk 2 down on the burner, the conductors 1 may be movedfrom the flame, or projected outward at a slight angle.

as indicated by dotted lines Fig. 4. Thus the same result will beattained as with the construction and combination of parts illus tratedin Figs. 1, 2, 8.

What I claim is:

1. In a miners lamp of the type indicated, the combination, with a wickand burner attachment, and a series of wire conductors w extending intothe body of the lamp and projecting alongside the protruding portion ofthe wick, and a movable device applied to the outer ends of theconductors and adapted, when duly adjusted, to force them laterallytoward or from the wick, as shown and described.

2. In a miners lamp of the type indicated, the combination with a wickand burner attachment, and a series of conductors extending into thebody of the lamp and projecting alongside the protruding portion of thewick, of means for adjusting said conductors laterally with relation tothe outer end of the wick, the same consisting of a disk which ismovable on the burner and provided with openings through which theconductors project, the adjustment of the disk in one direction or theother serving to proj ect the conductors more or less, in the mannerdescribed.

8. In a miners lamp of the type indicated, the combination with a wickand burner attachment, and a series of conductors extending into thebody of the lamp and projecting alongside the protruding portion of thewick, and a disk mounted rotatably on the burner and provided with aseries of eccentric slo'ts through which the said conductors project,whereby, upon rotation of said disk, the conductors are moved outward orinward correspondingly.

R. L. GRAVES.

Witnesses SoLoN C. KEMoN, AMos W. HART.

